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(FILES) This January 26, 2014 file photo shows Willie Nelson as he arrives on the red carpet for the 56th Grammy Awards at the Staples Center in Los Angeles, California. Music icons including Willie Nelson and Neil Young will campaign against the power of agricultural companies and the rise of genetically modified food at the 30th anniversary of Farm Aid. The musicians on July 28, 2015 announced that the latest incarnation of Farm Aid, launched in 1985 to support struggling US farmers, would take place on September 19 in Chicago on Lake Michigan.The 30th anniversary show will include the three stars who put together the original benefit concert -- 82-year-old country legend Willie Nelson, folk rocker and activist Neil Young and heartland rocker John Mellencamp. AFP PHOTO ROBYN BECKROBYN BECK/AFP/Getty Images